JP6359316B2 - Three-dimensional laminating apparatus and three-dimensional laminating method - Google Patents

Description

  The present invention relates to a three-dimensional laminating apparatus and a three-dimensional laminating method for producing a three-dimensional object by laminating.

  As a technique for manufacturing a three-dimensional shape, a layered manufacturing technique for manufacturing a three-dimensional shape by irradiating a metal powder material with a light beam is known. For example, Patent Document 1 discloses a three-dimensional shape in which a powder layer formed of a metal powder material is irradiated with a light beam to form a sintered layer, and a plurality of sintered layers are laminated integrally by repeating this process. A method for manufacturing a shaped object is described. In Patent Document 2, a laser beam and powdered metal are output from a central opening formed in a conical nozzle that can be freely attached and detached, and the workpiece to be processed is irradiated with a laser to shallowly store a liquefied metal. Is formed, and a device for depositing by supplying powdered metal to the position is described.

JP 2009-1900 A Japanese National Patent Publication No. 10-501463

  By the way, in the additive manufacturing technique for manufacturing a three-dimensional shape, a technique for manufacturing the three-dimensional shape with high accuracy is required.

  An object of this invention is to provide the three-dimensional laminating apparatus and the three-dimensional laminating method which manufacture a three-dimensional shaped object with high precision.

  In order to solve the above-described problems and achieve the object, the present invention provides a three-dimensional laminating apparatus for forming a three-dimensional shape by laminating a molding layer on a base portion, and a powder toward the base portion. A powder supply unit that sprays the material and supplies the powder material, and the powder material that moves from the powder supply unit toward the base unit is irradiated with a light beam, the powder material is melted, and the melted A light irradiation unit that solidifies the powder material on the base unit to form the molding layer; and a control device that controls operations of the powder supply unit and the light irradiation unit.

  It is preferable to have a plurality of storage units that store the powder material supplied to the powder supply unit, and to have a powder introduction unit that switches the powder material to be introduced into the powder supply unit by switching the storage unit.

  The powder introduction unit includes three or more storage units, and can introduce three or more types of powder materials into the powder supply unit. When switching from one powder material to a second powder material, after forming the molding layer with the first powder material, the molding with an intermediate powder material having a high affinity for both the first powder material and the second powder material. After forming the layer, it is preferable to form the molding layer with the second powder material.

  Further, the powder introduction unit has two or more storage units, and two or more kinds of powder materials can be introduced into the powder supply unit, and the control device supplies the powder material to be introduced into the powder supply unit. When switching from one powder material to the second powder material, after forming the molding layer with the first powder material, the powder of the second powder material in a state where the first powder material is supplied to the powder supply unit. It is preferable to start the supply to the supply unit and change the supply ratio by increasing the supply amount of the second powder material while decreasing the supply amount of the first powder material.

  Moreover, it is preferable to provide a machine and a machining part which machines the molding layer with the tool.

  Further, the powder supply unit is disposed concentrically on the outer periphery of the light irradiation unit, and the space between the inner tube surrounding the path through which the light beam of the light irradiation unit passes and the outer tube covering the inner tube is the It is preferable to be a powder flow path through which the powder material flows.

  The outer peripheral side of the powder supply unit is arranged concentrically on the outer periphery of the light irradiation unit, surrounds the outer periphery of the region where the powder material is injected from outside the powder flow path, and the base unit It is preferable to further have a shield gas supply part for supplying a shield gas injected toward the surface.

  Moreover, it is preferable to further have a focal position adjusting unit that adjusts a focal position of the light beam irradiated by the light irradiation unit.

  Moreover, it is preferable that the said focus position adjustment part is a mechanism to which the position of the said light irradiation part is moved.

  Moreover, it is preferable that the said focus position adjustment part is a mechanism which adjusts the condensing optical system of the said light irradiation part, and moves a focal distance or a focus position.

  A temperature detection unit configured to detect a temperature of the surface of the molding layer; and the control device outputs light output from the light irradiation unit according to a measurement result of the surface temperature of the molding layer by the temperature detection unit. It is preferable to control the intensity of the beam.

  Further, the control device specifies a position for detecting the temperature based on the measurement result of the surface temperature of the molding layer by the temperature detection unit and the characteristics of the base and the molding layer, and the specified position It is preferable to control the intensity of the light beam output from the light irradiation unit based on the detection result.

  In addition, a plasma emission detection unit that detects plasma emission of the surface of the molding layer, and the control device determines the intensity of the light beam output from the light irradiation unit according to a measurement result by the plasma emission detection unit. It is preferable to control.

  In addition, the apparatus has a reflected light detection unit that detects reflected light from the surface of the molding layer, and the control device determines the intensity of the light beam output from the light irradiation unit according to the measurement result by the reflected light detection unit. Is preferably controlled.

  The light irradiation unit, the powder supply unit, and the base unit have a moving mechanism that relatively moves, and the control device is configured to move the light irradiation unit and the base unit by the moving mechanism. It is preferable to determine a path through which the powder supply unit passes.

  Moreover, it has a shape measurement unit that measures the surface shape of the molding layer, and the control device is configured to control the powder supply unit and the light irradiation unit according to the measurement result of the surface shape of the molding layer by the shape measurement unit. It is preferable to control the operation of the moving mechanism.

  Moreover, it is preferable that the said light irradiation part can adjust the profile of the said light beam.

  Moreover, it is preferable that the said light irradiation part can switch the mode which irradiates the said light beam with a pulse wave, and the mode which irradiates with a continuous wave.

  Moreover, it is preferable to have a powder collection | recovery part which collect | recovers the powder material which was supplied from the said powder supply part and was not melt | dissolved with the said light beam.

  Moreover, it is preferable to further have a classification part which isolate | separates the collection material collect | recovered by the said powder collection | recovery part for every characteristic of powder material.

A storage unit that stores the powder material supplied to the powder supply unit; and an identification unit that identifies the powder material stored in the storage unit, the storage unit identified by the identification unit Having a powder introduction part for introducing the powder material into the powder supply part,
It is preferable that the control device controls the introduction of the powder material from the powder introduction unit to the powder supply unit according to the identification result of the powder material of the identification unit.

  Moreover, it is preferable that the said control apparatus further controls operation | movement of at least one of the said powder supply part and the said light irradiation part according to the identification result of the said powder material by the said powder introduction part.

  The control device, based on the identification result of the powder material of the identification unit and an instruction to mix and supply different powder materials from the powder supply unit, the different powder materials from the powder introduction unit to the powder supply unit Are preferably mixed and supplied.

  In order to solve the above-described problems and achieve the object, the present invention provides a three-dimensional laminating method in which a molding layer is laminated on a base portion to form a three-dimensional shape, and a powder material is used on the base portion. The powder material is melted by irradiating the powder material with a light beam while being sprayed, and the molded powder layer is formed on the base portion by solidifying the molten powder material on the base portion. Then, the molding layer is laminated.

  Preferably, the position of the molding layer is detected and the focal position of the light beam is adjusted according to the position of the molding layer.

  Moreover, it is preferable to detect the temperature of the surface of the molding layer and control the intensity of the output light beam according to the measurement result of the surface temperature of the molding layer.

  Moreover, it is preferable to detect the plasma emission of the surface of the molding layer and control the intensity of the output light beam according to the measurement result of the plasma emission of the molding layer.

  Further, it is preferable that the reflected light on the surface of the molding layer is detected and the intensity of the output light beam is controlled according to the measurement result of the reflected light from the molding layer.

  Further, it is preferable to switch between a mode in which the light beam is irradiated with a pulse wave and a mode in which the light beam is irradiated with a continuous wave, depending on the molding layer to be formed.

  According to the present invention, a three-dimensional shaped object can be manufactured with high accuracy.

FIG. 1 is a schematic diagram showing a three-dimensional laminating apparatus according to this embodiment. FIG. 2 is a cross-sectional view showing an example of the tip of the laminated head. FIG. 3 is a schematic diagram showing a schematic configuration of a structure for supplying a powder material of the laminated head. FIG. 4 is an exploded view showing a schematic configuration of the distribution unit and the branch pipe of the laminated head. FIG. 5 is a perspective view showing a schematic configuration of a structure for supplying the powder material around the nozzles of the stacking head. FIG. 6 is a schematic diagram illustrating a schematic configuration of the mixing unit. FIG. 7 is an explanatory diagram showing transition of the cross section of the mixing portion. FIG. 8 is a schematic diagram showing the configuration of the control device. FIG. 9 is a schematic diagram illustrating a schematic configuration of each unit installed in the stacking head storage chamber. FIG. 10 is a schematic diagram illustrating an example of a machining unit measurement unit. FIG. 11A is a schematic diagram illustrating an example of a powder introduction unit. FIG. 11B is a schematic diagram illustrating an example of a powder introduction unit. FIG. 12 is a schematic diagram illustrating an example of a powder recovery unit. FIG. 13 is an explanatory diagram showing a method of manufacturing a three-dimensional shape by the three-dimensional laminating apparatus according to this embodiment. FIG. 14A is an explanatory diagram illustrating a method of manufacturing a three-dimensional shape by the three-dimensional stacking apparatus according to the present embodiment. FIG. 14B is an explanatory diagram illustrating a method of manufacturing a three-dimensional shape by the three-dimensional stacking apparatus according to the present embodiment. FIG. 14C is an explanatory diagram illustrating a method for manufacturing a three-dimensional object by the three-dimensional stacking apparatus according to the present embodiment. FIG. 15 is a flowchart illustrating a manufacturing process of a three-dimensional shape object by the three-dimensional stacking apparatus according to the present embodiment. FIG. 16 is a flowchart illustrating an example of a process of determining a forming layer forming condition by the three-dimensional laminating apparatus according to the present embodiment. FIG. 17 is an explanatory diagram for explaining an example of forming conditions of the molding layer. FIG. 18 is an explanatory diagram for explaining an example of forming conditions of the molding layer. FIG. 19 is an explanatory diagram for explaining an example of forming conditions of the molding layer. FIG. 20 is an explanatory diagram for explaining an example of forming conditions of the molding layer. FIG. 21 is an explanatory diagram for explaining an example of forming conditions of the molding layer. FIG. 22 is an explanatory diagram for explaining an example of forming conditions of the molding layer. FIG. 23 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. FIG. 24 is a flowchart illustrating an example of a process of exchanging the leading end portion of the stacking head by the three-dimensional stacking apparatus according to the present embodiment. FIG. 25 is a flowchart showing an example of a powder identification process by the three-dimensional laminating apparatus according to the present embodiment. FIG. 26 is a schematic diagram illustrating another example of the peripheral portion of the stacking head of the three-dimensional stacking apparatus. FIG. 27 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. FIG. 28 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. FIG. 29 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. FIG. 30 is a schematic diagram illustrating another example of the laminated head. FIG. 31 is a schematic diagram illustrating an example of a powder introduction unit. FIG. 32 is a schematic diagram illustrating an example of a powder introduction unit. FIG. 33 is a flowchart illustrating an example of a processing operation performed by the three-dimensional stacking apparatus. FIG. 34 is an explanatory view showing an example of a molded layer manufactured by a three-dimensional laminating apparatus. FIG. 35 is a flowchart illustrating an example of a processing operation performed by the three-dimensional stacking apparatus. FIG. 36 is a graph showing an example of the relationship used for determining the balance of the powder material. FIG. 37 is an explanatory view showing an example of a molded layer manufactured by a three-dimensional laminating apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there are two or more embodiments, what comprises a combination of each Example is also included.

  FIG. 1 is a schematic diagram showing a three-dimensional laminating apparatus 1 of the present embodiment. Here, in the present embodiment, one direction in the horizontal plane is the X-axis direction, and in the horizontal plane, the direction orthogonal to the X-axis direction is the direction orthogonal to the Y-axis direction, the X-axis direction, and the Y-axis direction (that is, the vertical direction). ) Is the Z-axis direction.

  A three-dimensional laminating apparatus 1 shown in FIG. 1 is an apparatus that manufactures a three-dimensional shape on a base part 100. The base part 100 is a member that becomes a base on which a three-dimensional shaped object is formed, and is transported to a predetermined position by the three-dimensional laminating apparatus 1 to form a three-dimensional formed object on the surface. The base part 100 of this embodiment is a plate-shaped member. The base unit 100 is not limited to this. The base unit 100 may use a member that becomes a base of a three-dimensional shape object, or may use a member that adds a three-dimensional shape object. A member that becomes a part or product may be used as the base part 100 by forming a three-dimensional formed object at a predetermined position.

  The three-dimensional laminating apparatus 1 includes a three-dimensional laminating chamber 2, a spare chamber 3, a laminating head storage chamber 4, a machining unit storage chamber 5, a bed 10, a table unit 11, a laminating head 12, and machining. Unit 13, control device 20, heating head 31, machining unit measuring unit 32, tool changing unit 33, nozzle changing unit 34, powder introducing unit 35, air discharging unit 37, and gas introducing unit 38, a powder recovery unit 39, a temperature detection unit 120, and a mass detection unit 130.

  The three-dimensional stacking chamber 2 is a casing (chamber) in which a portion other than a designed communication portion such as a connected pipe is sealed from the outside. In addition, the designed communication part is provided with a valve or the like for switching between a sealed state and an open state, and the three-dimensional stacking chamber 2 can be sealed if necessary. The three-dimensional laminating chamber 2 includes a bed 10, a table unit 11, a laminating head 12, a part of the machining unit 13, a part of the heating head 31, a machining unit measurement unit 32, and a tool changer 33. And the nozzle replacement | exchange part 34 is arrange | positioned inside.

  The preliminary chamber 3 is provided adjacent to the three-dimensional stacking chamber 2. The spare chamber 3 is sealed from the outside except for designed communication parts such as connected pipes. The preliminary chamber 3 is a decompression chamber that connects the outside and the three-dimensional stacking chamber 2. A base moving unit 36 is provided in the preliminary chamber 3. Here, in the preliminary chamber 3, for example, a door 6 having airtightness is provided at a connection portion of the three-dimensional stacking chamber 2. In addition, the preliminary chamber 3 is connected to the outside by a door 7 having airtightness. In addition, the spare chamber 3 is provided with an air discharge unit 25 that discharges air from the spare chamber 3. The preliminary chamber 3 can carry in a necessary member from the outside by opening the door 7. Moreover, the preliminary | backup chamber 3 can carry in and carrying out a member between the three-dimensional lamination | stacking chambers 2 by opening the door 6. FIG.

  The stacking head storage chamber 4 is provided on the upper surface of the three-dimensional stacking chamber 2 in the Z-axis direction. The stacking head storage chamber 4 is supported by the Z-axis slide portion 4a so as to be movable in the Z-axis direction (arrow) with respect to the three-dimensional stacking chamber 2. The laminated head storage chamber 4 has a lower surface in the Z-axis direction connected to the three-dimensional laminated chamber 2 by a bellows 18. The bellows 18 is connected to the lower surface in the Z-axis direction of the stacking head storage chamber 4 and the three-dimensional stacking chamber 2, and the lower surface of the stacking head storage chamber 4 in the Z-axis direction is a part of the three-dimensional stacking chamber 2. . The three-dimensional stacking chamber 2 has an opening formed in a region surrounded by the bellows 18. A space surrounded by the lower surface of the stacked head storage chamber 4 in the Z-axis direction and the bellows 18 is connected to the three-dimensional stacked chamber 2 and is sealed together with the three-dimensional stacked chamber 2. The laminated head storage chamber 4 supports the laminated head 12, the shape measuring unit 30, and the heating head 31. Further, in the stacking head storage chamber 4, a part including the nozzle 23 of the stacking head 12 and a part including the tip 24 of the heating head 31 protrude from the lower surface in the Z-axis direction toward the three-dimensional stacking chamber 2. ing.

  The stacked head storage chamber 4 moves in the Z-axis direction by the Z-axis slide part 4a, thereby moving the held stacked head 12, the shape measuring unit 30, and the heating head 31 in the Z-axis direction. Further, since the laminated head storage chamber 4 is connected to the three-dimensional laminated chamber 2 via the bellows 18, the bellows 18 is deformed in accordance with the movement in the Z-axis direction, so that the three-dimensional laminated chamber 2 and the laminated head storage are accommodated. A sealed state with the chamber 4 can be maintained.

  The machined part storage chamber 5 is provided on the upper surface of the three-dimensional stacking chamber 2 in the Z-axis direction. Further, the machining section storage chamber 5 is disposed adjacent to the laminated head storage chamber 4. The machining section storage chamber 5 is supported by the Z-axis slide section 5a so as to be movable in the Z-axis direction (the direction of the arrow 104) with respect to the three-dimensional stacking chamber 2. The machined portion storage chamber 5 is connected to the three-dimensional stacking chamber 2 by a bellows 19 on the lower surface in the Z-axis direction. The bellows 19 connects the lower surface of the machining unit storage chamber 5 in the Z-axis direction and the three-dimensional stacking chamber 2, and the lower surface of the machining unit storage chamber 5 in the Z-axis direction of the three-dimensional stacking chamber 2. Part. The three-dimensional stacking chamber 2 has an opening formed in a region surrounded by the bellows 19. A space surrounded by the Z-axis direction lower surface of the machined portion storage chamber 5 and the bellows 19 is connected to the three-dimensional stacking chamber 2 and sealed together with the three-dimensional stacking chamber 2. The machining unit storage chamber 5 supports the machining unit 13. Further, in the machining portion storage chamber 5, a part including the tool 22 of the machining portion 13 protrudes from the lower surface in the Z-axis direction toward the three-dimensional stacking chamber 2.

  The machining section storage chamber 5 moves in the Z-axis direction by the Z-axis slide section 5a, thereby moving the held machining section 13 in the Z-axis direction. Further, since the machining section storage chamber 5 is connected to the three-dimensional stacking chamber 2 via the bellows 19, the bellows 19 is deformed in accordance with the movement in the Z-axis direction, and the three-dimensional stacking chamber 2 is machined. The sealed state with the part storage chamber 5 can be maintained.

  The bed 10 is provided at the bottom in the Z-axis direction in the three-dimensional stacking chamber 2. The bed 10 supports the table unit 11. The bed 10 is provided with various wirings, piping, and driving mechanisms.

  The table unit 11 is disposed on the upper surface of the bed 10 and supports the base unit 100. The table unit 11 includes a Y-axis slide unit 15, an X-axis slide unit 16, and a rotary table unit 17. The table part 11 attaches the base part 100 and moves the base part 100 on the bed 10.

  The Y-axis slide part 15 moves the X-axis slide part 16 with respect to the bed 10 along the Y-axis direction (the direction of the arrow 106). The X-axis slide unit 16 is fixed to a member that is an operation unit of the Y-axis slide unit 15, and the rotary table unit 17 is moved along the X-axis direction (the direction of the arrow 108) relative to the Y-axis slide unit 15. Let The rotary table unit 17 is fixed to a member that is an operation unit of the X-axis slide unit 16 and supports the base unit 100. The rotary table unit 17 is, for example, an inclined circular table, and includes a fixed base 17a, a rotary table 17b, an inclined table 17c, and a rotary table 17d. The fixed base 17 a is fixed to a member that becomes an operating part of the X-axis slide part 16. The rotary table 17b is supported by the fixed base 17a, and rotates around the rotary shaft 110 parallel to the Z-axis direction. The tilt table 17c is supported by the rotary table 17b, and is rotated about the rotary shaft 112 orthogonal to the surface of the rotary table 17b. The rotary table 17d is supported by the tilt table 17c, and is rotated about a rotary shaft 114 orthogonal to the surface of the tilt table 17c that is supported. The tilting table 17d fixes the base part 100. In this way, the rotary table unit 17 can rotate the base unit 100 around three orthogonal axes by rotating each unit around the rotation shafts 110, 112, and 114. The table unit 11 moves the base unit 100 fixed to the rotary table unit 17 in the Y-axis direction and the X-axis direction by the Y-axis slide unit 15 and the X-axis slide unit 16. Moreover, the table part 11 rotates the base part 100 around three orthogonal axes by rotating each part around the rotation axes 110, 112, and 114 by the rotary table part 17. The table unit 11 may further move the base unit 100 along the Z-axis direction.

  The laminating head 12 injects a powder material toward the base part 100, further melts the powder by irradiating the injected powder material with laser light, and solidifies the molten powder on the base part 100. A molding layer is formed. The powder introduced into the lamination head 12 is a powder of a material that is a raw material for a three-dimensional shape. In the present embodiment, for example, a metal material such as iron, copper, aluminum, or titanium can be used as the powder. As the powder, a material other than a metal material such as ceramic may be used. The laminated head 12 is provided at a position facing the upper surface of the bed 10 in the Z-axis direction, and faces the table unit 11. The laminated head 12 is provided with a nozzle 23 at the bottom in the Z-axis direction. In the laminated head 12, the nozzle 23 is attached to the main body 46.

  First, the nozzle 23 will be described with reference to FIG. FIG. 2 is a cross-sectional view showing an example of the nozzle 23 of the laminated head 12. As shown in FIG. 2, the nozzle 23 is a double tube having an outer tube 41 and an inner tube 42 inserted into the outer tube 41. The outer tube 41 is a tubular member, and has a diameter that decreases toward the tip (lower side in the Z-axis direction). The inner tube 42 is inserted into the outer tube 41. The inner tube 42 is also a tubular member and has a shape whose diameter decreases toward the tip (lower side in the Z-axis direction). The nozzle 23 is a powder flow path 43 through which the powder material (powder) P passes between the inner periphery of the outer tube 41 and the outer periphery of the inner tube 42. The inner peripheral surface side of the inner tube 42 becomes a laser path 44 through which the laser light passes. Here, the main body 46 to which the nozzle 23 is mounted is a double tube like the nozzle 23, and the powder flow path 43 and the laser path 44 are also formed in the same manner. In the laminated head 12, the powder flow path 43 is disposed so as to surround the laser path 44. In the present embodiment, the powder flow path 43 serves as a powder injection unit that injects powder. In the lamination head 12, the powder material P introduced from the powder introduction part 35 flows through the powder flow path 43 and is ejected from the nozzle ejection port part 45 which is an opening at the end between the outer tube 41 and the inner tube 42. .

  The laminated head 12 includes a light source 47, an optical fiber 48, and a light collecting unit 49. The light source 47 outputs laser light L. The optical fiber 48 guides the laser light L output from the light source 47 to the laser path 44. The condensing unit 49 is disposed in the laser path 44 and is disposed in the optical path of the laser light L output from the optical fiber 48. The condensing unit 49 condenses the laser light L output from the optical fiber 48. The laser beam L condensed by the condenser 49 is output from the end of the inner tube 42. In the laminated head 12, the light collecting portion 49 is disposed in the main body 46, but a part or all of the light collecting portion 46 may be disposed in the nozzle 23. When a part or all of the light condensing unit 46 is disposed on the nozzle 23, the focal position can be set to a different position by exchanging the nozzle 23.

  The three-dimensional laminating apparatus 1 has a focal position adjustment unit 140. The focal position adjusting unit 140 moves the condensing unit 49 along the traveling direction of the laser light L. The focal position adjusting unit 140 can adjust the focal position of the laser light L by moving the position of the condensing unit 49 along the traveling direction of the laser light L. As the focal position adjusting unit 140, a mechanism for adjusting the focal length of the light collecting unit 49 can also be used. In the three-dimensional laminating apparatus 1, the Z-axis slide part 4a is also one of the focal position adjustment parts. In the Z-axis slide portion 4a, a focal position P1 of the laser light L and a position (for example, a focal position of the injected powder material) P2 where the powder material is ejected move integrally. The focal position P1 of the laser beam L can be moved also with respect to the position P2 at which is injected. The three-dimensional laminating apparatus 1 can switch an object to be controlled according to an object to be adjusted.

  The stacking head 12 ejects the powder P from the powder flow path 43 and outputs the laser light L from the laser path 44. The powder P ejected from the lamination head 12 enters the region irradiated with the laser beam L output from the lamination head 12 and is heated by the laser beam L. After the powder P irradiated with the laser beam L is melted, it reaches the base 100. The powder P that has reached the base 100 in a molten state is cooled and solidified. Thereby, a molding layer is formed on the base part 100.

  Here, the laminated head 12 of the present embodiment does not need to have an optical fiber that guides the laser light L output from the light source 47 by the optical fiber 48. Further, the condensing part 49 may be provided on the main body 46, the nozzle 23, or both. Since the laminated head 12 of the present embodiment can be processed effectively, the powder flow path 43 for injecting the powder P and the laser path 44 for irradiating the laser light L are provided coaxially, but the present invention is not limited to this. The stacking head 12 may have a mechanism for spraying the powder P and a mechanism for irradiating the laser beam L as separate bodies. In the laminated head 12 of this embodiment, the powder material is irradiated with the laser beam L, but it is sufficient if the powder material can be dissolved or sintered, and a light beam other than the laser beam may be irradiated.

  Next, the route through which the powder material of the laminated head 12 is supplied will be described in more detail. FIG. 3 is a schematic diagram showing a schematic configuration of a structure for supplying a powder material of the laminated head. FIG. 4 is an exploded view showing a schematic configuration of the distribution unit and the branch pipe of the laminated head. FIG. 5 is a perspective view showing a schematic configuration of a structure for supplying the powder material around the nozzles of the stacking head. FIG. 6 is a schematic diagram illustrating a schematic configuration of the mixing unit. FIG. 7 is an explanatory diagram showing transition of the cross section of the mixing portion. As shown in FIG. 2, the laminating head 12 is supplied with the powder material from the powder introduction unit 35 via the powder supply pipe 150. The stacking head 12 includes a distribution unit 152 and a plurality of branch pipes 154 as a mechanism for supplying the supplied powder material to the powder flow path 43.

  The distributor 152 distributes the powder supplied from the powder supply pipe 150 and supplies it to the branch pipe 154. The plurality of branch pipes 154 are pipes that connect the distribution unit 152 and the powder channel 43, and supply the powder supplied from the distribution unit 152 to the powder channel 43. In the laminated head 12 of this embodiment, as shown in FIG. 5, three branch pipes 154 are arranged evenly in the circumferential direction, that is, at intervals of 120 °.

  The branch pipe 154 includes a mixing unit 156 therein. The mixing unit 156 is a mechanism for homogenizing the powder flowing through the branch pipe 154 in the branch pipe 154, and a plurality of stirring plates 156a and 156b are arranged. As shown in FIGS. 4, 6, and 7, the stirring plates 156 a and 156 b have a structure twisted around the axial direction of the branch pipe 154 along the flow direction of the branch pipe 154. Further, the stirring plate 156a disposed in the range 155a and the stirring plate 156b disposed in the range 155b are reversely twisted. Thereby, the flow of the fluid passing through the mixing unit 156 becomes a flow that changes according to the axial position of the branch pipe 154 as shown in FIG. This promotes stirring. 7 shows, from the left in the figure, the cross section along the line AA, the cross section along the line BB, the cross section along the line CC in FIG. 6, the stirring plate 156a side, the cross section along the line CC, the 156b side, Each shape of the D line section and the EE line section is shown. In the present embodiment, the number of branch pipes 154 is three, but the number is not particularly limited. The branch pipes 154 are preferably arranged evenly in the circumferential direction, that is, at regular angular intervals.

  Further, the laminating head 12 is provided with a rectifier 158 in the powder flow path 43. The rectifier 158 rectifies the flow containing the powder material supplied from the three branch pipes 154. Thereby, the lamination | stacking head 12 can make the flow of the powder material inject | poured from the powder flow path 43 into the flow which prepared, and can supply with high precision to the target position.

  The machining unit 13 performs machining of a molded layer or the like, for example. As shown in FIG. 1, the machining portion 13 is provided at a position facing the upper surface of the bed 10 in the Z-axis direction, and faces the table portion 11. The machined portion 13 has a tool 22 attached to the lower portion in the Z-axis direction. In addition, the machining part 13 should just be provided in the movable range of the base part 100 by the table part 11 in the Z-axis direction upper side than the bed 10, and an arrangement position is not restricted to the position of this embodiment. .

  FIG. 8 is a schematic diagram illustrating the configuration of the control device 20. The control device 20 is electrically connected to each part of the three-dimensional laminating apparatus 1 and controls the operation of each part of the three-dimensional laminating apparatus 1. The control device 20 is installed outside the three-dimensional stacking chamber 2 and the spare chamber 3. As illustrated in FIG. 8, the control device 20 includes an input unit 51, a control unit 52, a storage unit 53, an output unit 54, and a communication unit 55. Each part of the input part 51, the control part 52, the memory | storage part 53, the output part 54, and the communication part 55 is electrically connected.

  The input unit 51 is an operation panel, for example. The worker inputs information, commands, and the like to the input unit 51. The control unit 52 is, for example, a CPU (Central Processing Unit) and a memory. The control unit 52 outputs a command for controlling the operation of each part of the three-dimensional laminating apparatus 1 to each part of the three-dimensional laminating apparatus 1. In addition, information from each unit of the three-dimensional laminating apparatus 1 is input to the control unit 52. The storage unit 53 is a storage device such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The storage unit 53 stores an operation program of the three-dimensional laminating apparatus 1 that controls the operation of each unit by being executed by the control unit 52, information of the three-dimensional laminating apparatus 1, design information of a three-dimensional shape object, and the like. Is done. The output unit 54 is a display, for example. The output unit 54 displays information from each unit of the three-dimensional laminating apparatus 1, for example. The communication unit 55 communicates with a communication line such as the Internet or a LAN (Local Area Network) and exchanges information with the communication line. In addition, the control apparatus 20 should just have the control part 52 and the memory | storage part 53 at least. If the control device 20 has the control unit 52 and the storage unit 53, it can output a command to each unit of the three-dimensional stacking device 1.

  As shown in FIG. 9, the shape measuring unit 30 is fixed to the laminated head storage chamber 4. The shape measuring unit 30 is disposed adjacent to the laminated head 12. The shape measuring unit 30 measures the surface shape of the molding layer formed on the base unit 100. As the shape measuring unit 30, for example, a 3D scanner or a device that measures a relative distance can be used. For example, the shape measuring unit 30 scans (scans) the laser beam on the surface of the molding layer on the base unit 100, and calculates the position information (the distance indicated by the arrow 160) of the surface of the molding layer from the reflected light. Measure the surface shape of the molding layer. Further, in the present embodiment, the shape measuring unit 30 is attached to the laminated head storage chamber 4, but it is sufficient that the surface shape of the molding layer formed on the base unit 100 can be measured, and it is attached to another position. May be.

  The heating head 31 heats the molding layer on the base 100 or the molten powder P. The heating head 31 is fixed to the laminated head storage chamber 4. The heating head 31 is disposed adjacent to the laminated head 12. The heating head 31 irradiates laser light, infrared light, or electromagnetic waves, for example, and heats the molding layer or the melted powder P. By heating the molding layer or the melted powder P with the heating head 31, the temperature of the molding layer or the melted powder P can be controlled. Thereby, the rapid temperature fall of the shaping | molding layer or the fuse | melted powder P can be suppressed, or the atmosphere (high temperature environment) where the powder P is easy to fuse | melt can be formed.

  The temperature detection unit 120 is disposed adjacent to the heating head 31. FIG. 9 is a schematic diagram illustrating a schematic configuration of each unit installed in the stacking head storage chamber. As shown in FIG. 9, the temperature detection unit 120 outputs the measurement wave 164 to a range including the position where the laser light L is irradiated and the range where the laser light 162 is irradiated and heated by the heating head 31, and sets the temperature. measure. The temperature detection unit 120 can use various temperature sensors that measure the temperature of the surface on which the molding layer is formed.

  The mass detection unit 130 detects the mass of the base unit 100 attached to the rotary table 17 d of the rotary table unit 17. The mass detector 130 can use a load cell.

  The machining unit measurement unit 32 measures the position of the tip 56 of the tool 22 of the machining unit 13. FIG. 10 is a schematic diagram illustrating an example of the machining unit measurement unit 32. As illustrated in FIG. 10, the machining unit measurement unit 32 includes a light source unit 57 and an imaging unit 58. The machining unit measurement unit 32 positions the tip 56 of the tool 22 of the machining unit 13 between the light source unit 57 and the imaging unit 58. The light source unit 57 is, for example, an LED. The imaging unit 58 is, for example, a CCD (Charge Coupled Device) camera. The machining unit measurement unit 32 emits the light LI from the light source unit 57 toward the imaging unit 58 in a state where the tip 56 of the tool 22 is disposed between the light source unit 57 and the imaging unit 58. Get an image. Thereby, an image in which light is blocked by the tip 56 of the tool 22 can be acquired. The machining unit measurement unit 32 analyzes the image acquired by the imaging unit 58, and specifically detects the boundary between the position where the light is incident and the position where the light is not incident, whereby the shape of the tip 56, The position can be acquired. Based on the acquired position of the tip 56 of the tool 22 and the position of the machining unit 13 (position of the machining unit accommodating chamber 5), the control device 20 accurately determines the tip of the tool 22 attached to the machining unit 13. The correct position. The machining unit measurement unit 32 is not limited to this configuration as long as it measures the position of the tip 56 of the machining unit 13, and may be measured by laser light, for example.

  The tool changer 33 is disposed inside the three-dimensional stacking chamber 2. The tool exchange unit 33 exchanges the tool 22 attached to the machining unit 13. The tool changer 33 moves a portion that does not hold the tool 22 to a position facing the machining unit 13. Thereafter, the tool changer 33 moves the tool 22 to a position where the tool 22 is not gripped at a position facing the machining unit 13. Then, the process which removes the tool 22 with which the machining part 13 was mounted | worn is performed. Thereafter, the part holding another tool 22 to be mounted on the machining unit 13 is moved to a position facing the machining unit 13, and the other tool 22 is attached to the machining unit 13. Thus, the tool changer 33 can replace the tool 22 of the machining unit by attaching and detaching the tool 22 of the machining unit 13. The tool changer 33 is not limited to this configuration as long as the tool 22 of the machining part can be changed.

  The nozzle replacement unit 34 is disposed inside the three-dimensional stacking chamber 2. The nozzle replacement unit 34 replaces the nozzles 23 attached to the stacking head 12. The nozzle changer 34 can use the same structure as the tool changer 33.

  The powder introduction unit 35 introduces a powder material, which is a raw material for the three-dimensional shape, into the lamination head 12. FIG. 11A and FIG. 11B are schematic views each showing an example of a powder introduction part. As shown in FIG. 11A, in this embodiment, the powder P is managed in a state of being enclosed in a cartridge 83. That is, the powder is shipped in a cartridge 83 for each type of material, for example. The cartridge 83 is provided with a material display portion 84. The material display part 84 is a display which shows the information of powder, such as the kind of material, for example. The material display unit 84 is not limited to information that can be visually confirmed, and may be a display such as an IC chip, a two-dimensional code, or a mark that can acquire information by reading with a reader. The material display part 84 will not be restricted to these, if the kind of powder material can be shown. In addition to the type of powder material, the material display unit 84 can display information on powder necessary for manufacturing a three-dimensional shape, such as powder particle size, weight, purity, or oxygen content. Moreover, the material display part 84 may contain the information which shows whether powder is a regular product.

The powder introduction unit 35 includes a powder storage unit 81 and a powder identification unit 82. The powder storage unit 81 is a box-shaped member, for example, and stores the cartridge 83 therein. The powder storage unit 81 is connected to a conveyance air supply unit for carrying out the powder and a conveyance path for conveying the powder to the lamination head 12. Powder housing 81, if the carts ridge 83 is accommodated, to introduce the powder reserved in the carts ridge 83 in the laminating head 12. When the powder identification unit 82 detects that the cartridge 83 is stored in the powder storage unit 81, the powder identification unit 82 reads the material display unit 84 of the cartridge 83 and reads information on the powder stored in the cartridge 83. The powder introduction unit 35 can supply known powder to the stacking head 12 by acquiring powder information by the powder identification unit 82.

Here, the powder introduction unit 35 may supply powder that is not managed in a state of being enclosed in the cartridge 83 to the stacking head 12. FIG. 11B shows the powder introduction part 35A when the powder is not enclosed in the cartridge. The powder introduction unit 35A includes a powder storage unit 81A, a powder identification unit 82A, and a powder guide tube 89 that connects the powder storage unit 81A and the powder identification unit 82A. The powder storage unit 81A is, for example, a box-shaped member, and stores the powder P therein. The powder identification unit 82A analyzes the powder P supplied through the powder guide tube 89, and manufactures a three-dimensional shape such as the material type, particle size, weight, purity, oxide coating, or oxygen content of the powder P. The information on the necessary powder P is measured. As the powder identification unit 82A, it is possible to use a spectroscopic analyzer that identifies a powder material by spectroscopic analysis, and use a particle size analyzer that measures the particle size of the powder P by particle size analysis, a weigh scale that measures the weight of the powder, or the like. it can. The powder identification unit 82A measures the purity of the powder from, for example, the measured material type, particle size, and weight of the powder P. Also, the powder identifying unit 82 A, for example, by conductivity, to measure the oxide film of the powder. The powder introduction unit 35 </ b> A can also supply known powder to the stacking head 12 by acquiring powder information by the powder identification unit 82 </ b> A.

  The base moving unit 36 is disposed in the preliminary chamber 3. The base moving unit 36 moves the base unit 100 a from the preliminary chamber 3 into the three-dimensional stacked chamber 2, and moves the base unit 100 in the three-dimensional stacked chamber 2 into the preliminary chamber 3. The base moving part 36 is attached with a base part 100a carried into the spare chamber 3 from the outside. The base moving part 36 carries the attached base part 100a from the preliminary chamber 3 into the three-dimensional stacking chamber 2. More specifically, the base moving unit 36 moves the base unit 100 attached to the base moving unit 36 into the three-dimensional stacking chamber 2 and attaches it to the rotary table unit 17. The base moving unit 36 moves the base unit 100 using, for example, a robot arm or an orthogonal axis transport mechanism.

  The air discharge part 37 is a vacuum pump, for example, and discharges the air in the three-dimensional stacking chamber 2. The gas introduction unit 38 introduces a predetermined component gas, for example, an inert gas such as argon or nitrogen, into the three-dimensional stacking chamber 2. The three-dimensional stacking apparatus 1 discharges air from the three-dimensional stacking chamber 2 through the air discharge unit 37 and introduces gas into the three-dimensional stacking chamber 2 through the gas introduction unit 38. Thereby, the three-dimensional laminating apparatus 1 can make the inside of the three-dimensional laminating chamber 2 a desired gas atmosphere. Here, in the present embodiment, the gas introduction part 38 is provided below the air discharge part 37 in the Z-axis direction. When the gas introduction part 38 is provided below the air discharge part 37 in the Z-axis direction and a gas for introducing argon having a higher specific gravity than a gas such as oxygen in the air is used, it is suitable for the three-dimensional stacking chamber 2. Can be filled with argon gas. In addition, what is necessary is just to reverse arrangement | positioning of piping, when making the gas introduced into a gas lighter than air.

  The powder recovery unit 39 recovers the powder P that has been ejected from the nozzle ejection port 45 of the laminated head 12 and that has not formed a molding layer. The powder recovery unit 39 sucks the air in the three-dimensional stacking chamber 2 and recovers the powder P contained in the air. The powder P sprayed from the lamination head 12 is melted and solidified by the laser light L to form a molding layer. However, a part of the powder P may remain in the three-dimensional stacking chamber 2 as it is, for example, when the laser beam L is not irradiated. Further, the chips cut by the machining unit 13 and discharged from the molding layer remain in the three-dimensional stacking chamber 2. The powder recovery unit 39 recovers the powder P and chips remaining in the three-dimensional stacking chamber 2. The powder recovery unit 39 may include a mechanism for mechanically recovering powder such as a brush.

  FIG. 12 is a schematic diagram illustrating an example of the powder recovery unit 39. As shown in FIG. 12, the powder recovery unit 39 includes an introduction unit 85, a cyclone unit 86, a gas discharge unit 87, and a powder discharge unit 88. The introduction portion 85 is, for example, a tubular member, and one end portion is connected to, for example, the three-dimensional stacking chamber 2. The cyclone portion 86 is, for example, a hollow frustoconical member, and its diameter decreases, for example, downward in the vertical direction. The other end of the introduction part 85 is connected to the cyclone part 86 along the tangential direction of the outer periphery of the cyclone part 86. The gas discharge part 87 is a tubular member, and one end part is connected to the upper end part of the cyclone part 86 in the vertical direction. The powder discharge portion 88 is a tubular member, and one end portion is connected to the end portion of the cyclone portion 86 on the lower side in the vertical direction.

  For example, a pump for sucking gas is connected to the other end of the gas discharge portion 87. Therefore, the gas discharge part 87 draws gas from the cyclone part 86, and makes the cyclone part 86 into a negative pressure. Since the cyclone portion 86 has a negative pressure, the introduction portion 85 sucks gas from the three-dimensional stacking chamber 2. The introduction part 85 sucks the powder P that has not formed the molding layer together with the gas in the three-dimensional stacking chamber 2. The introduction part 85 is connected to the cyclone part 86 along the tangential direction of the outer periphery of the cyclone part 86. Accordingly, the gas and the powder P sucked into the introduction part 85 swirl along the inner periphery of the cyclone part 86. Since the specific gravity of the powder P is higher than that of the gas, the powder P is centrifuged outward in the radial direction of the inner periphery of the cyclone portion 86. The powder P is discharged from the powder discharge unit 88 toward the powder discharge unit 88 below the stretching direction by its own weight. Further, the gas is discharged by the gas discharge unit 87.

  The powder recovery unit 39 recovers the powder P that has not formed the molding layer in this way. Moreover, the powder collection | recovery part 39 in this embodiment may divide | segment and collect the powder P for every specific gravity. For example, a powder having a low specific gravity is sucked into the gas discharge unit 87 without going to the powder discharge unit 88 because its own weight is small. Therefore, the powder recovery unit 39 can separate and recover the powder P for each specific gravity. In addition, the powder collection | recovery part 39 will not be restricted to such a structure, if the powder P which did not form a shaping | molding layer can be collect | recovered.

  Next, the manufacturing method of the three-dimensional shape object by the three-dimensional laminating apparatus 1 is demonstrated. FIG. 13 is a schematic diagram illustrating a method for manufacturing a three-dimensional shape by the three-dimensional laminating apparatus 1 according to the present embodiment. Moreover, the manufacturing method shown in FIG. 13 can be executed by the control device 20 controlling the operation of each part. In the present embodiment, a case where a three-dimensional object is manufactured on the pedestal 91 will be described. The pedestal 91 is, for example, a metal plate-like member, but the shape and material are arbitrary as long as a three-dimensional shape is manufactured on the top. The pedestal 91 is attached on the base part 100. The base unit 100 is fixed to the rotary table unit 17 of the table unit 11 together with the base 91. The pedestal 91 can also be used as the base part 100.

  As shown in step S <b> 1, the control device 20 causes the table unit 11 to move the base unit 100 so that the pedestal 91 on the base unit 100 is disposed below the stacking head 12 in the Z-axis direction.

  Next, as shown in step S <b> 2, the control device 20 introduces the powder P from the powder introduction unit 35 to the lamination head 12, and irradiates the laser light L while ejecting the powder P together with the gas from the lamination head 12. The powder P is sprayed toward the base 91 on the base 100 with a predetermined convergence diameter. The laser beam L is applied to the powder P with a predetermined spot diameter between the laminated head 12 and the pedestal 91. Here, the spot diameter in the Z-axis direction of the spot diameter of the laser beam L with respect to the position in the Z-axis direction of the convergence diameter of the powder P and the spot diameter at the position in the Z-axis direction of the convergence diameter of the powder P are, for example, condensing It can be controlled by moving the position of the portion 49.

  The control device 20 sprays the powder P while irradiating the laser beam L from the laminated head 12, so that the powder P is melted by the irradiation of the laser beam L as shown in step S <b> 3. The melted powder P falls as a melt A downward toward the pedestal 91 on the base part 100 in the Z-axis direction.

  The melt A that has dropped downward in the Z-axis direction reaches a predetermined position of the base 91 on the base portion 100. The melt A on the pedestal 91 is cooled, for example, by being allowed to cool at a predetermined position on the pedestal 91. The cooled melt A is solidified as a solidified body B on the pedestal 91 as shown in step S4.

  The control device 20 forms the solidified body B on the base unit 100 by the stacking head 12 according to the procedure shown in steps S2 to S4 while moving the base unit 100 to a predetermined position by the table unit 11. By repeating these procedures, the solidified body B forms a molding layer 92 having a predetermined shape on the pedestal 91 as shown in step S5.

  As shown in step S <b> 6, the control device 20 moves the base 91 of the base portion 100 by the table portion 11 so that the molding layer 92 formed on the base 91 is disposed below the machining portion 13 in the Z-axis direction. Move. Further, the control device 20 performs machining on the molded layer 92 by the machining unit 13. The control device 20 selects whether or not the machining by the machining unit 13 is performed, and may not be performed if unnecessary. Therefore, the machining shown in step S6 may not be performed depending on the command of the control device 20.

  Next, as shown in step S <b> 7, the control unit 20 causes the table unit 11 to place the base unit 100, for example, so that the molding layer 92 is positioned below the stacking head 12 in the Z-axis direction according to a command from the control device 20. Move to. And the procedure shown to step S2 to step S6 is repeated, the shaping | molding layer 93 is laminated | stacked sequentially on the shaping | molding layer 92, and a three-dimensional shape thing is manufactured.

  In summary, the three-dimensional stacking apparatus 1 according to the present embodiment manufactures a three-dimensional shape as follows. The powder injection unit of the laminated head 12 injects the powder P toward the base 91 on the base unit 100. Further, the inner tube 42 of the laminated head 12 irradiates the powder P with the laser light L between the laminated head 12 and the pedestal 91. The powder P irradiated with the laser light L is melted and solidified on a pedestal 91 on the base part 100 to form a molding layer 92. The three-dimensional laminating apparatus 1 sequentially laminates the molding layer 93 on the molding layer 92, and applies appropriate machining to the molding layers 92, 93 by the machining unit 13 to produce a three-dimensional shape product.

  In the present embodiment, the three-dimensional shape object is manufactured on the pedestal 91, but the three-dimensional shape object may not be manufactured on the pedestal 91. The three-dimensional shape may be manufactured directly on the base 100, for example. Moreover, the three-dimensional laminating apparatus 1 may perform what is called build-up welding by laminating a molding layer on an existing modeled object.

  In the present embodiment, the machining unit 13 machines the surface of the molding layer 92, for example, but may perform other machining. FIG. 14A to FIG. 14C are explanatory views showing a method of manufacturing a three-dimensional shape by the three-dimensional laminating apparatus 1 according to this embodiment. 14A to 14C show a procedure in which the three-dimensional laminating apparatus 1 manufactures the member 99 shown in FIG. 14C.

  The member 99 has a disc part 95, a shaft part 97, and a truncated cone part 98. The member 99 has a screw hole 96 formed in the disk portion 95. As shown in FIG. 14C, the disc portion 95 is a disc-shaped member. The shaft portion 97 is a shaft-shaped member having a diameter smaller than that of the disc portion 95 and extends from the central portion of one surface of the disc portion 95. The screw hole portion 96 is provided outside the shaft portion 97 of the disc portion 95. The truncated cone part 98 is provided at the tip of the shaft part 97, and its outer diameter increases in the direction opposite to the disk part 95. The major axis of the truncated cone part 98 is, for example, the same size as the outer diameter of the disk part 95. That is, the screw hole portion 96 is located inside the major axis of the truncated cone portion 98.

  Next, the manufacturing procedure of the member 99 by the three-dimensional laminating apparatus 1 will be described. As shown in FIG. 14A, the three-dimensional laminating apparatus 1 forms a disk portion 95 and a shaft portion 97 by laminating molding layers by the laminating head 12. In the three-dimensional laminating apparatus 1, after manufacturing the disc part 95 and the shaft part 97, as shown in FIG. 14B, the threaded part 96 is formed by the machining part 13. The three-dimensional laminating apparatus 1 forms the truncated cone part 98 on the shaft part 97 by laminating the molding layer by the laminating head 12 after forming the screw hole part 96. The member 99 is manufactured in this way.

  Here, the long diameter portion of the truncated cone portion 98 is located outside the screw hole portion 96. In other words, the screw hole portion 96 is covered with the truncated cone portion 98 at the top. Therefore, for example, when the member 99 is manufactured by machining, the processing tool of the screw hole portion 96 cannot be moved from the upper portion of the truncated cone portion 98 toward the disc portion 95. However, the three-dimensional laminating apparatus 1 forms the screw hole portion 96 before the truncated cone portion 98 is manufactured. In this case, the upper part of the screw hole 96 is not covered. Therefore, the three-dimensional laminating apparatus 1 can process the screw hole portion 96 by moving the machining portion 13 from the upper portion in the Z-axis direction along the Z-axis direction. As described above, the machining unit 13 can facilitate machining by adjusting the timing of forming the molding layer and machining.

  Next, a detailed process of manufacturing a three-dimensional shape object by the three-dimensional laminating apparatus 1 according to the present embodiment will be described. FIG. 15 is a flowchart illustrating a manufacturing process of a three-dimensional shape by the three-dimensional stacking apparatus 1 according to the present embodiment. For example, the control device 20 reads design information of a three-dimensional shape object stored in the storage unit 53.

  Next, the control device 20 discharges the air in the three-dimensional stacked chamber 2 by the air discharge unit 37 (step S11). Here, the three-dimensional stacking chamber 2 has a door 6 closed and is separated from the preliminary chamber 3. Further, the three-dimensional stacking chamber 2 is also closed and sealed at a portion communicating with other outside air. For example, the control device 20 discharges air by the air discharge unit 37 so that the oxygen concentration in the three-dimensional stacked chamber 2 is 100 ppm or less, preferably 10 ppm or less. The control device 20 can be in an inactive state when the oxygen concentration in the three-dimensional stacking chamber 2 is 100 ppm or less, and can be more reliably in an inactive state by being 10 ppm or less.

  Next, the base part 100 having the base 91 is attached to the base moving part 36 in the preliminary chamber 3 (step S12). Note that the three-dimensional laminating apparatus 1 may perform the process of step S12 prior to the process of step S11.

  If the base movement part 36 in the preliminary | backup room 3 is attached, the control apparatus 20 will close the door 7 of the preliminary | backup room 3, and will discharge the air in the preliminary | backup room 3 by the air discharge part 25 (step S13). The control device 20 reduces the oxygen concentration in the preliminary chamber 3 by discharging air from the air discharge unit 25. The oxygen concentration in the preliminary chamber 3 is preferably the same as that in the three-dimensional stacked chamber 2, for example.

  When the discharge of the air in the preliminary chamber 3 is completed, the control device 20 opens the door 6 of the three-dimensional stacking chamber 2, and the base moving unit 36 moves the base unit 100 to the rotary table unit 17 in the three-dimensional stacking chamber 2. Attach (step S14). The base unit 100 is fixed to the rotary table unit 17. When the base unit 100 is attached to the turntable unit 17, the control device 20 returns the base moving unit 36 into the spare chamber 3 and closes the door 6.

  If the control apparatus 20 sets the base part 100 to the turntable part 17, gas will be introduce | transduced in the three-dimensional lamination | stacking chamber 2 by the gas introduction part 38 (step S15). The control device 20 brings the inside of the three-dimensional stacked chamber 2 into the introduced gas atmosphere by the gas introduction unit 38. In the first embodiment, the gas introduced by the gas introduction unit 38 is an inert gas such as nitrogen or argon. The gas introduction unit 38 introduces an inert gas so that the residual oxygen concentration in the three-dimensional stacking chamber 2 is 100 ppm or less.

  Moreover, the three-dimensional laminating apparatus 1 may omit step S11, step S13, and step S15 depending on the type of powder material. For example, when the quality of the three-dimensional shape does not become a problem even when the powder material is oxidized, these steps may be omitted, and the three-dimensional stacking chamber 2 and the preparatory chamber 3 may be set to an air atmosphere.

  When the introduction of the inert gas into the three-dimensional stacking chamber 2 is completed, the control device 20 determines whether to machine the pedestal 91 on the base unit 100 (step S16). For example, the control device 20 causes the shape measuring unit 30 to measure the surface shape of the pedestal 91. The control device 20 determines whether to machine the pedestal 91 based on the measurement result of the shape measuring unit 30. For example, when the surface roughness of the pedestal 91 is larger than a predetermined value, the control device 20 determines to machine the pedestal 91. However, the necessity determination of the machining of the pedestal 91 by the control device 20 is not limited to this, and may not be based on the measurement result of the shape measuring unit 30. For example, the control device 20 may store information on the pedestal 91 in the storage unit 53, and determine whether or not the pedestal 91 needs to be processed from the information on the pedestal 91 and the design information of the three-dimensional shape object. Moreover, the control apparatus 20 is good also as the setting which always processes the base 91. FIG.

  When the control device 20 determines that the machining of the pedestal 91 is necessary (Yes in step S16), the machining unit 13 performs machining of the pedestal 91 under predetermined conditions (step S17). The control device 20 determines the machining conditions of the pedestal 91 based on, for example, the shape measurement result of the pedestal 91 by the shape measuring unit 30 or the information on the pedestal 91 and the design information of the three-dimensional shape.

  When the control device 20 determines that machining of the pedestal 91 is not necessary (No in step S16), or when machining the pedestal 91 under a predetermined condition, for example, a three-dimensional shape object read from the storage unit 53 Based on the design information, the formation condition of the molding layer is determined (step S18). The forming conditions of the forming layer include, for example, the shape of each layer of the forming layer, the type of powder P, the spraying speed of the powder P, the spraying pressure of the powder P, the irradiation condition of the laser light L, the convergent diameter of the powder P and the laser light L. The positional relationship between the spot diameter and the molding layer surface, the dimension of the powder A melted in the air, the temperature, the dimension of the molding layer surface melting pool B being formed, the cooling rate, or the moving speed of the base part 100 by the table part 11 These are necessary conditions for forming the molding layer.

  After determining the forming conditions of the molding layer, the control device 20 sprays the powder P toward the pedestal 91 on the base portion 100 by the lamination head 12, and starts the irradiation with the laser light L (step S19). The control device 20 can melt the powder P with the laser light L by irradiating the laser light L while injecting the powder P, and solidify the melted powder P. Form.

  The control apparatus 20 irradiates the laser beam L while injecting the powder P, and moves the base part 100 by the table part 11, thereby forming the molding layer 92 on the pedestal 91 (step S20). The control device 20 may heat the molding layer 92 with the heating head 31 or heat a portion before the solidified body adheres.

  After forming the molding layer 92, the control device 20 determines whether the molding layer 92 needs to be machined (step S21). For example, the control device 20 causes the shape measuring unit 30 to measure the surface shape of the molding layer 92. The control device 20 determines whether machining of the molding layer 92 is necessary based on the measurement result of the shape measuring unit 30. For example, the control device 20 determines that the molding layer 92 is to be machined when the surface roughness of the molding layer 92 is larger than a predetermined value. However, the criteria for determining whether machining of the molded layer 92 is necessary are not limited to this. For example, the control device 20 may determine whether or not the molding layer 92 needs to be machined based on the design information of the three-dimensional shape and the formation conditions of the molding layer. For example, when the surface roughness of the molding layer 92 calculated from the molding layer forming conditions is larger than the necessary surface roughness based on the design information of the three-dimensional shape, the control device 20 needs to machine the molding layer 92. You may make it judge that it is.

  When the control device 20 determines that machining of the molded layer 92 is not necessary (No in step S21), the control device 20 proceeds to step S24. When determining that the molding layer 92 needs to be machined (Yes in step S21), the control device 20 determines machining conditions for the molding layer 92 (step S22). For example, the control device 20 determines the processing conditions based on the measurement result of the shape measuring unit 30 or the design information of the three-dimensional shape object and the forming layer forming conditions. After determining the molding layer processing conditions, the control device 20 causes the machining unit 13 to machine the molding layer 92 based on the determined processing conditions (step S23).

  When the control device 20 performs machining of the molding layer 92 or determines that the machining of the molding layer 92 is not necessary, is it necessary to further stack the molding layer 93 on the molding layer 92? Is determined (step S24). For example, the control device 20 determines whether it is necessary to further stack the molding layer 93 on the molding layer 92 based on the design information of the three-dimensional shape read from the storage unit 53.

  When determining that the molding layer 93 needs to be stacked (Yes in Step S24), the control device 20 returns to Step S18 and stacks the molding layer 93 on the molding layer 92. When the control device 20 determines that the formation of the molding layer 93 is unnecessary (No in step S24), the manufacture of the three-dimensional shape is completed.

  The three-dimensional laminating apparatus 1 manufactures a three-dimensional shape in this way. The three-dimensional laminating apparatus 1 according to the present embodiment produces a three-dimensional shape by injecting the powder P by the laminating head 12 and irradiating the powder P with the laser light L. Specifically, the three-dimensional laminating apparatus 1 irradiates the powder P facing the object with the laser light L, melts it before reaching the object, and attaches the melt to the object. Thereby, it is possible to form the molding layer without dissolving the object with the laser light L or reducing the amount to be dissolved. Thereby, the influence which a laser beam gives to the manufactured target object and a shaping | molding layer can be decreased, and the process which laminates | stacks a solidified material on what was formed can be performed. As described above, the three-dimensional laminating apparatus 1 can manufacture a three-dimensional shape with high accuracy.

  Further, the three-dimensional laminating apparatus 1 can appropriately perform machining on the molding layer 92 by the machining unit 13. Therefore, the three-dimensional laminating apparatus 1 can manufacture a three-dimensional shape with high accuracy. In the above embodiment, machining can be performed with higher accuracy by performing machining on the molding layer and the base using the machining unit 13. It is not necessary to perform machining without providing it.

  In addition, the base moving unit 36 moves the base unit 100 into the three-dimensional stacking chamber 2. Air may be exhausted inside the three-dimensional stacking chamber 2. The base moving unit 36 can move the base unit 100 to the inside of the three-dimensional stacking chamber 2 without, for example, an operator entering the three-dimensional stacking chamber 2.

  Here, it is preferable that the three-dimensional laminating apparatus 1 includes the shape measuring unit 30 to determine the forming layer formation conditions. FIG. 16 is a flowchart illustrating an example of a process of determining a forming layer forming condition by the three-dimensional laminating apparatus 1 according to the present embodiment. The process of FIG. 16 can be executed as part of the process of step S18 of FIG. The control apparatus 20 measures the shape of the molding layer 92 by the shape measurement part 30 (step S31). The control device 20 may cause the shape measuring unit 30 to measure the shape of the molding layer 92 while forming the molding layer 92 on the laminated head 12. The shape measuring unit 30 can measure both the shape of the portion where the laminated head 12 is to form the solidified body B and the shape of the solidified body B formed at that portion. That is, the shape measuring unit 30 can measure the surface shape before and after the formation of the molding layer 92. After measuring the shape of the molding layer 92, the control device 20 determines the forming condition of the molding layer 92 based on the measurement result of the shape measuring unit 30 (step S33).

  The control device 20 determines the formation condition of the molding layer 92 according to the measurement result of the surface shape of the molding layer 92 by the shape measuring unit 30 and controls the operation of the stacking head 12. Therefore, the three-dimensional laminating apparatus 1 can more appropriately form the molding layer, for example, by making the distance between the portion where the molding layer is formed and the lamination head 12 constant. Furthermore, the three-dimensional laminating apparatus 1 can measure the shape of the molding layer 92 by the shape measuring unit 30 while forming the molding layer by the lamination head 12. Therefore, the three-dimensional laminating apparatus 1 can make the forming layer forming conditions more appropriate, and can manufacture a three-dimensional shape with higher accuracy. Here, in the above-described embodiment, the processing by the laminated head 12 has been described, but the processing by the machining unit 13 can be performed in the same manner. In addition, the forming layer formation condition determined in the above embodiment may be a condition that varies depending on the position, or may be a constant condition.

  Based on the detection result, the three-dimensional laminating apparatus 1 determines the movement path of the laminating head 12, that is, the relative relationship between the position of the laminating head 12 in the Z-axis direction and the movement by the table unit 11 as the forming condition of the moldable layer. It is preferable to do. Thereby, the thickness of the molding layer laminated | stacked, the solidification part temperature, and the lamination | stacking speed | rate can be equalize | homogenized.

  Here, the control device 20 may control the laser light L emitted from the laminated head 12 as the forming condition of the molding layer. That is, the operation of the light irradiation unit of the laminated head 12 may be controlled. Hereinafter, an example of control will be described with reference to FIGS. 17 to 22. FIG. 17 and FIG. 18 are explanatory diagrams for explaining an example of forming conditions of the molding layer. 17 and 18 show an example of the irradiated laser beam. The control device 20 may determine whether the laser light L emitted from the laminated head 12 is a pulse wave or a continuous wave as a forming layer formation condition. Specifically, based on various detection results and set conditions, a mode for irradiating a continuous wave laser beam L1 as shown in FIG. 17 and a pulsed laser beam L2 as shown in FIG. You may make it switch between modes. The control device 20 can reduce the laser output per unit time by using the pulsed laser beam L2 as compared with the continuous wave laser beam L1. Further, the output can be further adjusted by adjusting the width (duty ratio) of the pulse wave. Thereby, the laser beam to be irradiated can be adjusted according to the powder material to be supplied, the material of the base portion 100, the base 91, and the like, and processing can be performed with higher accuracy.

  FIG. 19 to FIG. 22 are explanatory diagrams for explaining an example of forming conditions of the molding layer. FIG. 19 shows an example of an output distribution of laser light, and FIG. 20 shows an example of a solidified body formed with the output distribution of FIG. The control device 20 may determine the output distribution of the laser light L emitted from the laminated head 12 as the forming layer formation condition. The control device 20 irradiates the laser light of the output distribution 170 of the Gaussian type distribution shown in FIG. 19 or the laser light of the caldera type output distributions 172 and 174 in which the output near the center shown in FIG. 21 is lower than the surroundings. Or the laser beam of the top hat type output distribution 176 having a constant center blowing output may be determined. For example, the control device 20 can form a solidified body B1 on a spherical surface as shown in FIG. 20 by using laser light having an output distribution 170 shown in FIG. Moreover, the control apparatus 20 can form the flat solidified body B2 as shown in FIG. 22 by using, for example, a laser beam having an output distribution 176 shown in FIG. Thereby, the three-dimensional laminating apparatus 1 can form a molding layer with higher accuracy by determining the thickness and width of the molding layer to be formed and the output distribution of the laser beam, for example.

  The three-dimensional laminating apparatus 1 may determine the processing operation based on the temperature distribution detected by the temperature detection unit 120. FIG. 23 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. The control device 20 detects the temperature distribution on the surface of the molding layer with the temperature detector 120 (step S42). The control device 20 can detect the temperature distribution over the entire surface of the molding layer by performing measurement with the temperature detection unit 120 while moving the base unit 100 with the table unit 11. The control device 20 may perform measurement before processing with the stacking head 12, or may perform measurement while processing with the stacking head 23.

  When detecting the temperature distribution, the control device 20 detects the shape (surface shape) of the molding layer by the shape measuring unit 30 (step S44). Detection of the surface shape of the molding layer and detection of the temperature distribution may be performed simultaneously.

  When detecting the shape of the molding layer, the control device 20 specifies a detection position at which the temperature detection unit detects the temperature based on the shape of the molding layer and the temperature distribution (step S46), and detects the temperature at the specified position. (Step S48). The control device 20 determines processing conditions based on the detected temperature (step S49), and ends this process.

  The three-dimensional laminating apparatus 1 can perform more appropriate processing by measuring the temperature at a specific position, for example, a place where it is difficult to cool or a place where it is easily heated, and determining a processing condition (formation condition).

  Further, the three-dimensional laminating apparatus 1 determines the moving path of the laminating head 12 as a processing condition based on the temperature distribution and the shape, that is, by determining the processing condition in consideration of the temperature distribution, the molded layer to be stacked The thickness, the solidified part temperature, and the lamination speed can be made uniform. In other words, it is possible to grasp a place where it is difficult to cool or a place where it is easy to warm, and to perform a more uniform machining with definitive machining conditions.

  Here, it is preferable that the three-dimensional laminating apparatus 1 allows the temperature detection unit 120 and the heating head 31 to rotate around the Z axis with respect to the laminating head 12. Thereby, according to the moving direction of the table part 11, the relative position of the lamination | stacking head 12, the temperature detection part 120, and the heating head 31 can be made constant, or can be switched. Further, the three-dimensional product apparatus 1 may be provided so that two temperature detectors 120 and two heating heads 31 are provided for the laminated head 12 and the laminated head 12 is sandwiched between them.

  Further, the three-dimensional laminating apparatus 1 may determine the processing operation using the detection result of the mass detection unit 130. For example, a change in mass caused by the formed molded product may be detected to evaluate the three-dimensional laminate being manufactured. Specifically, the density of the three-dimensional laminate can be calculated by detecting changes in the formed size and mass, and it can be determined whether or not voids are formed in the three-dimensional laminate. In addition, the three-dimensional laminating apparatus 1 is based on the weight of the mass detection unit 130, and the base unit 100 has a foreign object, specifically, a powder material that has not been melted or chips generated by machining by the machining unit 13. It is also possible to detect whether or not there is adhesion. Thereby, it can use for control of operation | movement of the powder collection | recovery part 39. FIG.

  Moreover, the three-dimensional laminating apparatus 1 can include a step of exchanging the nozzles 23 of the laminating head 12 by including the nozzle exchanging unit 34. FIG. 24 is a flowchart illustrating an example of a process of replacing the nozzles 23 of the stacking head 12 by the three-dimensional stacking apparatus 1 according to the present embodiment. First, the control apparatus 20 determines the formation conditions of the molding layer 92 (step S61). The processing conditions in step S61 are determined by, for example, the same method as the determination of the forming conditions of the molding layer 92 in step S18 of FIG.

  After determining the formation conditions, the control device 20 determines whether to replace the nozzles 23 of the stacking head 12 based on the determined formation conditions of the molding layer 92 (step S62). The control device 20 emits a laser beam L having a smaller spot diameter from the tool 22 of the machined portion 13 when, for example, the determined forming conditions of the forming layer 92 increase the forming accuracy of the forming layer 92. Or, it is determined that it is necessary to replace the powder P with a smaller one for converging the diameter of the injection of the powder P. However, the condition for determining whether to replace the nozzle 23 of the laminated head 12 is not limited to this.

  When it is determined that the nozzle 23 of the stacking head 12 is to be replaced (Yes in step S62), the control device 20 replaces the nozzle 23 of the stacking head 12 by the nozzle replacement unit 34 (step S63).

  When the nozzle 23 of the stacking head 12 is replaced, the control device 20 ejects the powder P and irradiates the laser light L with the stacked head 12 whose nozzle is replaced (Step S64), and forms the molding layer 92 (Step S64). S65), this process is finished. When it is determined that the nozzle 23 of the laminated head 12 does not need to be replaced (No in step S62), the control device 20 performs the injection of the powder P and the irradiation of the laser light L by the laminated head 12 whose nozzle is not replaced. (Step S64), the molding layer 92 is formed (Step S65), and this process is terminated.

  Thus, the three-dimensional laminating apparatus 1 can replace the nozzles 23 of the laminating head 12 based on the forming conditions of the molding layer 92 determined by the nozzle exchanging unit 34. Therefore, the three-dimensional laminating apparatus 1 according to this embodiment can perform the formation of the molding layer 92 more appropriately or more easily. Here, in the above-described embodiment, the replacement of the nozzle has been described. However, the tool can be replaced in the same manner.

  Furthermore, the three-dimensional laminating apparatus 1 can include a step of identifying the powder to be introduced into the laminating head 12 by having the powder introduction unit 35. FIG. 25 is a flowchart showing an example of a powder identification process by the three-dimensional laminating apparatus 1 according to this embodiment. The control device 20 detects that the powder has been set in the powder introduction unit 35 (step S71). For example, it detects that the cartridge 83 containing the powder is stored in the powder storage unit 81.

  When the powder is set, the control device 20 identifies the powder from the powder identification unit 82 of the powder introduction unit 35 (step S72). The control device 20 reads the material display unit 84 of the cartridge 83 by the powder identification unit 82 of the powder introduction unit 35, for example, and manufactures a three-dimensional shape product such as the type, particle size, weight, purity, or oxygen content of the powder. To detect the necessary powder information. The control device 20 may identify the powder in the powder introduction unit 35A by the powder identification unit 82A of the powder introduction unit 35A.

  After identifying the powder, the control device 20 determines whether the powder in the powder introduction unit 35 is appropriate based on the powder identification result (step S73). For example, the control device 20 determines whether the powder in the powder introduction unit 35 is appropriate based on design information of the three-dimensional shape. For example, when the powder in the powder introduction unit 35 is an inappropriate material for producing a three-dimensional shape product to be produced, the control device 20 determines that the powder in the powder introduction unit 35 is not appropriate. to decide.

  When the control device 20 determines that the powder is appropriate (Yes in Step S73), the control device 20 introduces the powder into the stacking head 12 by the powder introduction unit 35 (Step S74).

  Next, the control apparatus 20 determines the formation conditions of the shaping | molding layer 92 based on the information of the powder identified by step S72 (step S75), and complete | finishes this process. Here, the lamination head 12 may mix and inject different powders, for example. In this case, the control apparatus 20 determines the formation conditions of the shaping | molding layer 92 based also on the command content which mixes and injects different powder. Here, the formation conditions of the molding layer 92 are the same as those in step S18 of FIG. 15. For example, the shape of each layer of the molding layer 92, the type of powder, the spraying speed of the powder P, the spraying pressure of the powder P, Conditions necessary for forming the molding layer, such as the irradiation condition of the laser beam L, the temperature of the melt A, the cooling temperature of the solidified body B, or the moving speed of the base part 100 by the table part 11.

  When the control device 20 determines that the powder is not appropriate (No in step S73), the control unit 20 sends information indicating that the powder is not appropriate or information about the inappropriate powder to an external data server or the like via the communication unit 55. This is transmitted (step S76), and this process is terminated. In this case, the control device 20 ends this process without issuing a powder introduction command from the powder introduction unit 35 to the stacking head 12. That is, the three-dimensional laminating apparatus 1 stops supplying the powder to the laminating head 12 when determining that the powder is not appropriate.

  As described above, the control device 20 controls the introduction of the powder from the powder introduction unit 35 to the stacking head 12 according to the powder identification result by the powder introduction unit 35. If the powder is not suitable, the quality of the three-dimensional shape produced can be reduced. Moreover, when the laser beam L is irradiated to the powder which is not appropriate, there exists a possibility that safety may fall, such as catching fire. The powder introduction unit 35 introduces the powder into the lamination head 12 only when the powder is appropriate. Therefore, the three-dimensional laminating apparatus 1 according to the present embodiment can suppress the deterioration of the quality of the three-dimensional shaped object, or can suppress the decrease in safety.

  Further, when it is determined that the powder is not appropriate, the control device 20 can transmit information indicating that the powder is not appropriate or information regarding the inappropriate powder to an external data server or the like. By storing these pieces of information in an external data server, the powder used by the three-dimensional laminating apparatus 1 can be made more appropriate. Therefore, the three-dimensional laminating apparatus 1 according to the present embodiment can improve the quality of the three-dimensional shape.

  Further, the control device 20 determines the formation condition of the molding layer 92 according to the powder identification result by the powder introduction unit 35 and controls the operation of the stacking head 12. Therefore, the three-dimensional laminating apparatus 1 according to the present embodiment can form the molding layer 92 more appropriately.

  The three-dimensional laminating apparatus may further include another detection unit as an apparatus for detecting a parameter for controlling the formation conditions. FIG. 26 is a schematic diagram illustrating another example of the peripheral portion of the stacking head of the three-dimensional stacking apparatus. The three-dimensional laminating apparatus shown in FIG. 26 includes a temperature detection sensor 120a, a half mirror 182, a plasma emission detection unit 190, and a reflected light detection unit 192 around the laser beam path of the lamination head. The half mirror 182 is disposed between the light source 47 and the condensing unit 49, transmits laser light from the light source 47 toward the condensing unit 49, and reflects laser light from the condensing unit 49 toward the light source 47. That is, the half mirror 182 reflects the laser beam reflected by the base part 100 and the molding layer in a predetermined direction.

  The plasma light emission detection unit 190 detects plasma generated by irradiating the base unit 100 or the molding layer with the laser light L. The reflected light detection unit 192 detects the laser light reflected by the half mirror 182. Moreover, the temperature detection unit 120a detects the temperature based on the state of the irradiation position of the laser beam reflected and reflected by the mirror 182.

  Next, an example of control executed using each unit will be described with reference to FIGS. FIG. 27 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. The control device 20 detects the temperature with the temperature detection unit 120a (step S102), determines the intensity of the laser beam based on the detected result (step S104), and ends the present process. The control device 20 determines the output of the laser beam based on the result detected by the temperature detection unit 120a, so that the temperature of the molding layer can be made more uniform and highly accurate processing can be performed.

  FIG. 28 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. The control device 20 detects the plasma emission with the plasma emission detector 190 (step S112), determines the intensity of the laser beam based on the detected plasma emission (step S114), and ends the present process. The control device 20 can determine the output of the laser beam based on the result detected by the plasma light emission detection unit 190, thereby making it possible to make the temperature of the molding layer more uniform and perform processing with higher accuracy. Here, the control device 20 can monitor the temperature of the focal position of the laser by detecting the plasma emission with the plasma emission detection unit 190. Moreover, the powder melting state in the air can be monitored by detecting plasma that emits light when the injected powder enters the laser beam and melts.

  FIG. 29 is a flowchart illustrating an example of a process for determining the forming condition of the molding layer. The control device 20 detects the reflected light with the reflected light detection unit 192 (step S122), determines the intensity of the laser light based on the detected reflected light (step S124), and ends this process. The control device 20 can also make the temperature of the molding layer more uniform and perform highly accurate processing by determining the output of the laser light based on the result detected by the reflected light detection unit 192. Here, the control apparatus 20 can monitor the temperature of the position where the melt A adheres by detecting the reflected light with the reflected light detection unit 192. In FIGS. 27 to 29, the output of the laser beam is determined based on the measurement result. However, the focal position of the laser beam may be determined and adjusted to the determined focal position. In this case, the stacking head 13 may be moved, or the focal position adjusting unit 140 may change only the focal position P1 of the laser light L and adjust the relative position to the position P2 where the powder material is ejected. .

  FIG. 30 is a schematic diagram illustrating another example of the laminated head. In the laminated head 12 a shown in FIG. 30, a pipe line 202 is further arranged outside the outer pipe 42. A passage is formed between the pipe line 202 and the outer pipe 42. A purge gas supply unit 204 is connected to the passage via a purge gas supply pipe 206. The lamination head 12a is provided with a pipe line 202 outside the powder flow path 43, forming a triple nozzle, and supplying the purge gas 214 from the outside of the powder flow path 43, whereby the powder supplied from the powder flow path 43 is diffused. This can be suppressed, and the powder material can be appropriately injected to the target position.

  The three-dimensional laminating apparatus preferably introduces a plurality of types of powder from the powder introduction unit. FIG. 31 is a schematic diagram illustrating an example of a powder introduction unit. 31 includes powder storage units 240 and 242, a buffer unit 244, a carrier air supply unit 246, and valves 250 and 252. The two powder storage units 240 and the powder storage unit 242 store different powders, respectively. The powder storage units 240 and 242 have the same functions as the powder storage units 81 and 81A described above. The buffer unit 244 temporarily stores the powder supplied from the powder storage units 240 and 242. The buffer unit 244 is connected to the powder supply pipe 150. The carrier air supply unit 246 supplies the buffer unit 244 with air that carries the powder. The valve 250 is disposed between the powder storage unit 240 and the buffer unit 244, and is switched between opening and closing to supply powder from the powder storage unit 240 to the buffer unit 244 and to stop supplying the powder. Switch between and. The valve 252 is disposed between the powder storage unit 242 and the buffer unit 244, and is switched between opening and closing to supply powder from the powder storage unit 242 to the buffer unit 244 and to stop supplying the powder. Switch between and.

  The powder introduction part 35B is configured as described above, and the type of powder supplied to the buffer part 244 can be controlled by switching between opening and closing of the valves 250 and 252. The powder supplied to the buffer unit 244 is conveyed to the powder supply pipe 150 together with the carrier air supplied from the carrier air supply unit 246 and supplied to the stacking head 12. The powder introduction part 35B can supply two types of powder.

  FIG. 32 is a schematic diagram illustrating an example of a powder introduction unit. A powder introduction unit 35C illustrated in FIG. 32 includes powder storage units 240, 242, and 247, a buffer unit 244a, a carrier air supply unit 246, and valves 250, 252, and 254. The three powder storage units 240, the powder storage unit 242, and the powder storage unit 244 store different powders, respectively. The intermediate powder stored in the powder storage unit 247 is a material having an affinity for both the first powder stored in the powder storage unit 240 and the second powder stored in the powder storage unit 242. The powder storage units 240, 242, and 247 have the same functions as the powder storage units 81 and 81A described above. The buffer unit 244a temporarily stores the powder supplied from the powder storage units 240, 242, and 247. The buffer unit 244a is connected to the powder supply pipe 150. The carrier air supply unit 246 supplies air for carrying powder to the buffer unit 244a. The valve 250 is disposed between the powder storage unit 240 and the buffer unit 244a, and is switched between opening and closing to supply powder from the powder storage unit 240 to the buffer unit 244a and to stop supplying the powder. Switch between and. The valve 252 is disposed between the powder storage unit 242 and the buffer unit 244a, and is switched between opening and closing to supply powder from the powder storage unit 242 to the buffer unit 244a and to stop supplying the powder. Switch between and. The valve 254 is disposed between the powder storage unit 247 and the buffer unit 244a, and is switched between opening and closing to supply powder from the powder storage unit 247 to the buffer unit 244a and to stop supplying the powder. Switch between and.

  The powder introduction unit 35C has the above-described configuration, and the type of powder supplied to the buffer unit 244a can be controlled among three types by switching between opening and closing of the valves 250, 252, and 254. The powder supplied to the buffer unit 244 a is transported to the powder supply pipe 150 together with the transport air supplied from the transport air supply unit 246 and supplied to the stacking head 12. In addition, the kind of powder which can be supplied in a powder introduction part is not limited to 2 types and 3 types, It is good also as 4 or more types. Moreover, the powder introducing | transducing part can grasp | ascertain the kind and characteristic of the powder to supply by identifying a powder in a powder identification part.

  FIG. 33 is a flowchart illustrating an example of a processing operation performed by the three-dimensional stacking apparatus. FIG. 34 is an explanatory view showing an example of a molded layer manufactured by a three-dimensional laminating apparatus. 33 and 34 show an example of the processing operation using the powder introduction unit 35C. When detecting an instruction to switch the powder supplied from the powder introduction unit 35C from the first powder material to the second powder material (step S142), the control device 20 specifies the intermediate powder material (step S144). The intermediate powder material is a powder that has a high affinity with both of the two powders to be switched and is easy to adhere and adhere. For example, when a switching instruction from the powder in the powder storage unit 240 to the powder in the powder storage unit 242 is detected, the powder in the powder storage unit 247 is specified as an intermediate powder.

  When specifying the intermediate powder material, the control device 20 switches the powder material supplied to the stacking head 12 from the first powder material to the intermediate powder material (step S146). When switching to the intermediate powder material, the control device 20 determines whether or not the formation of the molding layer of the intermediate powder material is completed (step S148). When it is determined that the formation of the intermediate powder material forming layer is not completed (No in Step S148), the control device 20 returns to Step S148. That is, the control device 20 continues to supply the intermediate powder material until the formation of the molding layer of the intermediate powder material is completed, and repeats the process of step S148.

  When it is determined that the formation of the molding layer of the intermediate powder material is completed (Yes in Step S148), the control device 20 switches the powder material supplied to the stacking head 12 from the intermediate powder material to the second powder material (Step S149). This process is terminated. The control device 20 performs the process of FIG. 33 and switches the powder materials supplied in the order of the first powder material, the intermediate powder material, and the second powder material, thereby forming the first powder material as shown in FIG. The layer 302, the molding layer 304 of the intermediate powder material, and the molding layer 306 of the second powder material can be laminated in this order. Thereby, even when different types of powder are laminated, the adhesion between the molding layers can be increased, and a three-dimensional structure with high accuracy can be formed.

  FIG. 35 is a flowchart illustrating an example of a processing operation performed by the three-dimensional stacking apparatus. FIG. 36 is a graph showing an example of the relationship used for determining the balance of the powder material. FIG. 37 is an explanatory view showing an example of a molded layer manufactured by a three-dimensional laminating apparatus. FIG. 35 to FIG. 37 are examples of processing operations using the powder introduction part 35B. When detecting an instruction to switch the powder supplied from the powder introduction unit 35B from the first powder material to the second powder material (step S150), the control device 20 calculates the ratio of the first powder material and the second powder material ( Step S150). Here, as shown in FIG. 36, the control device 20 has a relationship in which the ratio of the first powder material and the second powder material changes according to time, specifically, as the time from t1 to t2 increases, The ratio of the powder material decreases, the ratio of the second powder material increases, the ratio of the first powder material becomes 0, and the ratio of the second powder material becomes 100 at time t2.

  After determining the ratio, the control device 20 supplies the first powder material and the second powder material based on the determined ratio (step S154). When the control device 20 supplies the first powder material and the second powder material, the switching to the second powder material is completed, that is, the powder material supplied to the stacking head 12 is changed from the first powder material to the second powder material. It is determined whether or not 100% has been switched to (step S156). When it is determined that the switching has not been completed (No in step S156), the control device 20 returns to step S152. That is, the control device 20 repeats the processing from step S152 to step S156 until the switching is completed.

  When it is determined that the switching has been completed (Yes in step S156), the control device 20 ends this process. The control device 20 performs the process of FIG. 35 and changes the ratio of the first powder material and the second powder material while switching the powder material to be supplied from the first powder material to the second powder material. As shown in FIG. 5, the molding layer 312 of the first powder material, the intermediate molding layer 314 whose ratio gradually switches from the state of the first powder material to the state of the second powder material, the molding layer 316 of the second powder material. Can be laminated in order. By providing the intermediate forming layer 314 in this way, the adhesion between the forming layers can be increased, and a three-dimensional structure with high accuracy can be formed.

  As mentioned above, although embodiment of this invention was described, these embodiment is not limited by the content of these embodiment. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, various omissions, substitutions, or changes of the constituent elements can be made without departing from the spirit of the above-described embodiments and the like. For example, the three-dimensional laminating apparatus connects the control device 20 to an external device through a communication line such as the Internet, and changes and sets a processing condition, for example, a forming layer forming condition, based on an instruction input from the external device. May be. That is, the three-dimensional laminating apparatus may communicate using a communication line and change processing conditions from an external device.

DESCRIPTION OF SYMBOLS 1 Three-dimensional laminating apparatus 2 Three-dimensional laminating chamber 3 Preliminary chamber 4 Laminating head storage chamber 4a, 5a Z-axis slide part 5 Machining part storage chamber 6, 7 Door 10 Bed 11 Table part 12 Laminating head 13 Machining part 15 Y axis Slide part 16 X-axis slide part 17 Rotary table part 18, 19 Bellows 20 Control device 22 Tool 23 Nozzle 24 Tip part 25 Air discharge part 30 Shape measurement part 31 Heating head 32 Machining part measurement part 33 Tool exchange part 34 Nozzle exchange part 35, 35A Powder introduction part 36 Base moving part 37 Air discharge part 38 Gas introduction part 39 Powder recovery part 41 Outer pipe 42 Inner pipe 43 Powder flow path 44 Laser path 46 Main body
47 Light source 48 Optical fiber 49 Condensing part 51 Input part 52 Control part 53 Storage part 54 Output part 55 Communication part 56 Tip 57 Light source part 58 Imaging part 81, 81A Powder storage part 82, 82A Powder identification part 83 Cartridge 84 Material display part 85 Introduction part 86 Cyclone part 87 Gas discharge part 88 Powder discharge part 91 Pedestal 92, 93 Molding layer 95 Disk part 96 Screw hole part 97 Shaft part 98 Frustum part 99 Member 100 Base part 102, 104, 106, 108 Arrow 110, 112, 114 Rotating shaft 120, 120a Temperature detection unit 130 Mass detection unit 140 Focus position adjustment unit 150 Powder supply pipe 152 Distribution unit 154 Branch pipe 155a, 155b Range 156 Mixing unit 156a, 156b Stirring plate 158 Rectifier A Melt B Solidified body L Laser beam P Powder

Claims (40)

A three-dimensional laminating apparatus that forms a three-dimensional shape by laminating a molding layer on a base part,
A powder supply unit for injecting a powder material toward the base and supplying the powder material;
The molding material layer is formed by irradiating the powder material moving from the powder supply portion toward the base portion with a light beam, melting the powder material, and solidifying the melted powder material on the base portion. A light irradiation part for forming
In the space between the base portion and the powder supply portion, the powder material is irradiated with the light beam, and a droplet-shaped melt dissolved in the space is released from the space to the base portion. A control device for controlling the operation of the powder supply unit and the light irradiation unit so as to fall and solidify
A first reservoir for storing a first powder material to be supplied to the powder supplier;
A second storage section for storing a second powder material to be supplied to the powder supply section;
A buffer part to which at least one of the first powder material and the second powder material is temporarily supplied from the first storage part and the second storage part;
Whether to supply the first powder material from the first reservoir to the buffer unit and whether to supply the second powder material from the second reservoir to the buffer unit A powder switching unit for switching between,
A distribution unit to which the powder material from the buffer unit is supplied via a powder supply pipe;
A plurality of tubes connected to the distribution unit and the powder supply unit, the branch material tube is supplied with the powder material from the distribution unit, and supplies the supplied powder material to the powder supply unit,
A three-dimensional laminating apparatus. The three-dimensional laminating apparatus according to claim 1, further comprising a mixing unit that is provided inside each branch pipe and stirs the powder material inside each branch pipe. The three-dimensional laminating apparatus according to claim 2, wherein the mixing unit is a mechanism for homogenizing the powder material flowing in the branch pipe. The said mixing part is a three-dimensional laminating apparatus of Claim 3 which has the stirring board twisted around the axial direction of the said branch pipe along the flow direction of the said branch pipe. The stirring plate has a first range and a second range, and the stirring plate disposed in the first range and the stirring plate disposed in the second range have a twisting direction. The three-dimensional laminating apparatus according to claim 4, which is reverse. The three-dimensional lamination according to claim 2, further comprising a rectifier provided inside the powder supply unit downstream of the flow of the powder material from the mixing unit and rectifying the powder material supplied from the branch pipe. apparatus. The powder switching unit includes a first valve disposed between the first storage unit and the buffer unit, and a second valve disposed between the second storage unit and the buffer unit. The three-dimensional laminating apparatus according to claim 1, comprising: 3. The three-dimensional structure according to claim 1, further comprising a carrier air supply unit that supplies carrier air for conveying the first powder material and the second powder material supplied to the buffer unit to the powder supply pipe. Laminating equipment. When the control device switches the powder material to be introduced into the powder supply unit via the buffer unit from the first powder material to the second powder material, the control unit supplies the first powder material to the powder supply unit. And then forming the molding layer, in a state where the first powder material is supplied to the powder supply unit, the supply of the second powder material to the powder supply unit is started, 2. The three-dimensional laminating apparatus according to claim 1, wherein the powder switching unit is controlled to change the supply ratio by increasing the supply amount of the second powder material while decreasing the supply amount of the powder material. It has a 3rd storage part which stores the 3rd powder material supplied to the powder supply part, and the buffer part has the 1st storage part, the 2nd storage part, and the 3rd storage. The three-dimensional laminating apparatus according to claim 1, wherein at least one of the first powder material, the second powder material, and the third powder material is temporarily supplied from a section. When the control device switches the powder material to be introduced into the powder supply unit via the buffer unit from the first powder material to the second powder material, the control unit supplies the first powder material to the powder supply unit. The third powder material is an intermediate powder material having high affinity for both the first powder material and the second powder material. The three-dimensional laminating apparatus according to claim 10, wherein the powder switching unit is controlled so as to form the molding layer with the second powder material after being introduced into the powder supply unit and forming the molding layer. . The three-dimensional laminating apparatus according to any one of claims 1 to 11 , further comprising a machining unit that includes a tool and mechanically processes the molding layer with the tool. The powder supply unit is concentrically arranged on the outer periphery of the light irradiation unit, and the powder material is between an inner tube that surrounds a path through which the light beam of the light irradiation unit passes and an outer tube that covers the inner tube. The three-dimensional laminating apparatus according to any one of claims 1 to 12 , wherein the three-dimensional laminating apparatus is a powder flow path through which the gas flows. Concentrically disposed on the outer periphery of the light irradiation unit on the outer peripheral side of the powder supply unit, encloses the outer periphery of the region where the powder material is injected from the outside of the powder flow path, and toward the base unit The three-dimensional laminating apparatus according to claim 13 , further comprising a shield gas supply unit configured to supply a shield gas to be injected. The three-dimensional laminating apparatus according to any one of claims 1 to 14 , further comprising a focal position adjustment unit that adjusts a focal position of the light beam irradiated by the light irradiation unit. The three-dimensional laminating apparatus according to claim 15 , wherein the focal position adjustment unit is a mechanism that moves a position of the light irradiation unit. The three-dimensional stacking apparatus according to claim 15 , wherein the focal position adjustment unit is a mechanism that adjusts a condensing optical system of the light irradiation unit to move a focal length or a focal position. A temperature detection unit for detecting the temperature of the surface of the molding layer;
Said controller, in response to said temperature detecting section and the surface temperature of the molding layer measurement result of, according to any one of claims 1 to 17 for controlling the intensity of the light beam outputted from the light irradiating unit Three-dimensional laminating device. The control device specifies a position for detecting the temperature based on the measurement result of the surface temperature of the molding layer by the temperature detection unit and the characteristics of the base part and the molding layer, and detects the specified position. The three-dimensional laminating apparatus according to claim 18 , wherein the intensity of the light beam output from the light irradiation unit is controlled based on the result. Having a plasma emission detector for detecting plasma emission on the surface of the molding layer;
The three-dimensional stacking device according to any one of claims 1 to 19 , wherein the control device controls the intensity of a light beam output from the light irradiation unit according to a measurement result by the plasma light emission detection unit. A reflected light detection unit for detecting reflected light from the surface of the molding layer;
The three-dimensional laminating apparatus according to any one of claims 1 to 20 , wherein the control device controls an intensity of a light beam output from the light irradiation unit according to a measurement result by the reflected light detection unit. A moving mechanism for relatively moving the light irradiation unit, the powder supply unit, and the base unit;
The three-dimensional laminating apparatus according to any one of claims 1 to 21 , wherein the control device determines a path through which the light irradiation unit and the powder supply unit pass with respect to the base unit by the moving mechanism. Having a shape measuring unit for measuring the surface shape of the molding layer;
The three-dimensional lamination according to claim 22 , wherein the control device controls operations of the powder supply unit, the light irradiation unit, and the moving mechanism according to a measurement result of a surface shape of the molding layer by the shape measurement unit. apparatus. The three-dimensional laminating apparatus according to any one of claims 1 to 23 , wherein the light irradiation unit is capable of adjusting a profile of the light beam. The three-dimensional laminating apparatus according to any one of claims 1 to 24 , wherein the light irradiation unit is capable of switching between a mode in which the light beam is irradiated with a pulse wave and a mode in which the light beam is irradiated with a continuous wave. The three-dimensional laminating apparatus according to any one of claims 1 to 25 , further comprising a powder recovery unit that recovers a powder material that has been supplied from the powder supply unit and has not been melted by the light beam.   27. The three-dimensional laminating apparatus according to claim 26, further comprising a sorting unit that separates the collected material collected by the powder collecting unit for each characteristic of the powder material. The first comprises an identification unit for identifying the powder material stored in at least one of the reservoir or the second reservoir, before Symbol said powder supplying the powder material of the reservoir which is identified by the identification unit parts in is introduced,
Wherein the control device, in response to said identification result of the powder material of the identification unit, three-dimensional stacked according to prior Symbol said any one of claims 1 27 for controlling the introduction of the powder material into the powder feeder apparatus. Wherein the control device, if the powder was determined to be appropriate, prior SL to the powder feeder is introducing the powder material, in accordance with the identification result of the powder material of the identification unit, the conditions for forming the molded layer The three-dimensional laminating apparatus according to claim 28 , wherein the three-dimensional laminating apparatus is determined. 30. The three-dimensional structure according to claim 29 , wherein, when the different powders are mixed and injected, the control device determines a forming layer formation condition based on a command content of mixing and injecting different powders. Laminating equipment. Molding layer formation conditions are: shape of each layer of the molding layer, powder type, powder injection speed, powder injection pressure, laser light irradiation conditions, melt temperature, solidified cooling temperature, movement of base The three-dimensional laminating apparatus according to claim 29 or 30 , wherein the three-dimensional laminating apparatus has at least one of speeds. The control device is connected to an external device through a communication line, based on an instruction input from an external device, any one of 31 claims 29 capable of changing the conditions for forming the molded layer The three-dimensional laminating apparatus described in 1. Wherein the control device, if the powder was determined not be appropriate, the three-dimensional laminated device according to claim 28, wherein the stopping the supply of the powder material Previous Symbol powder feeder. The three-dimensional laminating apparatus according to claim 33 , wherein the control device transmits information indicating that the powder is not appropriate or information regarding the inappropriate powder to an external data server. A three-dimensional lamination method of forming a three-dimensional shape by laminating a molding layer on a base part,
The powder material is melted in the space by irradiating the powder material with a light beam in the space between the base portion and the powder supply portion while spraying the powder material toward the base portion, and the melting The droplet-shaped powder material is dropped from the space onto the base part and solidified on the base part to form a molding layer on the base part, and the molding layer is laminated ,
Storing the first powder material to be supplied to the powder supply unit by the first storage unit;
Storing the second powder material to be supplied to the powder supply unit by the second storage unit;
From the first storage part and the second storage part, supply at least one of the first powder material and the second powder material to the buffer part temporarily,
The powder switching unit switches whether to supply the first powder material from the first reservoir to the buffer unit, and the second powder material from the second reservoir to the buffer unit. Switch whether to supply
Supplying the powder material from the buffer section to the distribution section via a powder supply pipe;
The powder material is supplied from the distribution unit to the powder supply unit by a branch pipe that is a plurality of tubes connected to the distribution unit and the powder supply unit.
Three-dimensional lamination method. 36. The three-dimensional stacking method according to claim 35 , wherein the position of the molding layer is detected, and the focal position of the light beam is adjusted according to the position of the molding layer. 37. The three-dimensional laminating method according to claim 35 or 36 , wherein the temperature of the surface of the molding layer is detected, and the intensity of the output light beam is controlled according to the measurement result of the surface temperature of the molding layer. The three-dimensional lamination according to any one of claims 35 to 37 , wherein plasma emission on the surface of the molding layer is detected, and the intensity of the output light beam is controlled according to the measurement result of the plasma emission of the molding layer. Method. The three-dimensional lamination according to any one of claims 35 to 38 , wherein reflected light on the surface of the molding layer is detected, and the intensity of the output light beam is controlled according to the measurement result of the reflected light from the molding layer. Method. The three-dimensional laminating method according to any one of claims 35 to 39 , wherein a mode in which the light beam is irradiated with a pulse wave and a mode in which the light beam is irradiated with a continuous wave are switched according to the forming layer to be formed.

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